This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A084166 #2 Mar 31 2012 10:28:43 %S A084166 2,3,4,6,11,12,20,192,212,308,466,505,510,1932,3135,7704,7714,7716, %T A084166 12296,30804,198744,316370,316376,316504,1289220,3291300,5269140, %U A084166 5269157,8440956,8440984,55972776,55972788,89959080,89959230,89959334 %N A084166 Index of the primes in A084165. %Y A084166 Cf. A084165. %K A084166 nonn %O A084166 0,1 %A A084166 _Sven Simon_, May 17 2003